Ian:
Does that happen with all of your bitstreams or with just a few particular
ones? I have found that certain bitstreams cannot be filtered. Sometimes the
PDFs are locked so that the filter-media program can't read them or there are
PDFs of page images and so there is nothing to read. I have also encountered
problems with certain images as well.
I'm not sure what version of DSpace your using, but if this is a PDF giving you
this error, you could try switching from using "PDFBox" as the conversion
program in Filter-media for PDFs to another program "xpdf2text". This was
suggested to me a while ago and I ran my DSpace 1.6.2 instance with it. I am
now running using DSpace 1.7.1 and using the newer version of pdfbox that came
with it.
If you're interested in the xpdf2text solution there is a link:
https://jira.duraspace.org/secure/attachment/10527/xpdf-filters.html that I
have used in the past.
There may be newer information out there, so hopefully, better minds than mine
will chime in :)
George Kozak
Digital Library Specialist
Cornell University Library Information Technologies (CUL-IT)
501 Olin Library
Cornell University
Ithaca, NY 14853
607-255-8924
From: Wellaway, Ian [mailto:[email protected]]
Sent: Wednesday, November 30, 2011 5:48 AM
To: [email protected]
Subject: [Dspace-tech] Running filter-media script via cron
Hi,
Every time the filter-media script runs via the crontab, I get a lot of the
following:
ERROR filtering, skipping bitstream:
Item Handle: 10036/3175
Bundle Name: ORIGINAL
File Size: 180131
Checksum: b8b5c0b847ee01c404e0623a42aae1b2 (MD5)
Asset Store: 0
java.lang.NullPointerException
java.lang.NullPointerException
at org.pdfbox.pdmodel.PDPageNode.getAllKids(PDPageNode.java:194)
at org.pdfbox.pdmodel.PDPageNode.getAllKids(PDPageNode.java:182)
at
org.pdfbox.pdmodel.PDDocumentCatalog.getAllPages(PDDocumentCatalog.java:226)
at org.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:216)
at
org.dspace.app.mediafilter.PDFFilter.getDestinationStream(PDFFilter.java:139)
at
org.dspace.app.mediafilter.MediaFilterManager.processBitstream(MediaFilterManager.java:674)
at
org.dspace.app.mediafilter.MediaFilterManager.filterBitstream(MediaFilterManager.java:575)
at
org.dspace.app.mediafilter.MediaFilterManager.filterItem(MediaFilterManager.java:525)
at
org.dspace.app.mediafilter.MediaFilterManager.applyFiltersItem(MediaFilterManager.java:493)
at
org.dspace.app.mediafilter.MediaFilterManager.applyFiltersAllItems(MediaFilterManager.java:432)
at
org.dspace.app.mediafilter.MediaFilterManager.main(MediaFilterManager.java:363)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.dspace.app.launcher.ScriptLauncher.main(ScriptLauncher.java:212)
Any idea how I can fix this?
Thanks
Ian
------------
Ian Wellaway
Senior System Support & Development Officer
Academic Systems
Exeter IT
Room 909, Laver Building
University of Exeter
EX4 4QE
UK
tel +44 1392 722852
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